How to merge roof objects?

[crayzcrinkle]

I have various shapes as shown in the image below, but when I try to boolean union them, it’s not merging them together and is instead making weird lines and not just merging them into a perfect roof shape. How do i make it work?

https://imgur.com/uOoMFXc

[Kazrarr]

Hi, for that, it’s very simple follow images instructions :

I hope it can help you !!!